I learned today that MP4 (M4A) is the latest and best way to put quality audio on a website as a podcast, and installed the new version of Windows media player in order to play something I'd downloaded. It didn't, and I then had to download a decoder (actually one that Microsoft specifically suggested I didn't), in order to play it. Seemed strange but hey, it's MS.

I now want to manipulate the files in Audition 1.5 and just cannot find a decoder that works. I've tried Nero (that comes up with a message that it fails to initialise properly), and something called FAAC which doesn't work either.

I thought Audition was a fairly standard program for audio editing and am surprised it doesn't already support M4A. Can anyone point me to a suitable decoder please.